<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"><!--xmlns xmlnamespace的缩写-->
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<footer th:fragment="insert">
    <span th:text="插入"></span>
</footer>


</body>
</html>